The T4244/DB from Smiths Interconnect is a RF & Microwave Isolator with Frequency 4.2 to 4.4 GHz, Average Power Forward 65 W, Average Power Reverse 1 W, Peak Power Forward 0.5 kW, Insertion Loss 0.5 dB. Tags: Module with Connector, Coaxial Isolator. More details for T4244/DB can be seen below.